<xs:element name="NewsItemId" >
  <xs:annotation>
    <xs:documentation>
================================== NewsItemId ==================================
An identifier for the NewsItem. The combination of NewsItemId and DateId must
be unique among NewsItems that emanate from the same provider. Within these
constraints, the NewsItemId can take any form the provider wishes. It may take
the form of a name for the NewsItem that will be meaningful to humans, but this
is not a requirement. The provider may optionally relate the values of
NewsItemId to a controlled vocabulary, which is invoked by the Vocabulary
attribute. The value ofthe Vocabulary attribute may be an http URL, a NewsML
URN, or the # character followed by the value of the Duid attribute of a
TopicSet in the current document. The Scheme attribute, if present, serves to
distinguish which of possibly multiple naming schemes in the controlled
vocabulary is the one that governs the NewsItemId.
================================================================================

      </xs:documentation>
  </xs:annotation>
  <xs:complexType>
    <xs:simpleContent>
      <xs:extension base="xs:string">
        <xs:attribute name="Vocabulary" type="xs:string"/>
        <xs:attribute name="Scheme" type="xs:string"/>
      </xs:extension>
    </xs:simpleContent>
  </xs:complexType>
</xs:element>